AZ SB1545

Amends Arizona's presidential elector law to require electors to vote for candidates nominated by the political party that nominated them, replacing the current requirement to vote for the statewide popular vote winner.

Establishes a new interstate compact called the "Agreement Among the States to Elect the President by National Popular Vote" that takes effect when states with a majority of electoral votes (270+) join.

Requires each member state to conduct a statewide popular election and appoint electors based on the national popular vote winner across all member states, rather than their own state's results.

Directs chief election officials in member states to calculate a "national popular vote total" by combining votes from all participating states and designate the presidential slate with the highest national total as the winner.

Allows member states to withdraw from the compact, except for withdrawals occurring within six months of a president's term end, and terminates the agreement if the Electoral College is abolished.